Thread-trimming and stopping and starting mechanism



H. C. MILLER.

THREAD TRIMMING AND STOPPING AND STARTING MECHANISM.

APPLICATION FlLED JAN.29, 191s.

T 3T5TQ 14C, Patentad Nov. m, 192%.

2 SHEETS-SHEET 1- H. C. MILLER.

THREAD TRIMMING AND STOPPING AND STARTING MECHANISM.

APPLICATION FILED JAN. 29, I918 Patented Nov. 16, 1920.

2 SHEETSSHEET 2- II IIIIIIIII which movement lowers the suitable end coacts mal position as shown by full lines A in Fig. 4: the machine is inactive. A movement of the stirrup 61. rearwardly will rock the double bell crank lever mechanism to the positions shown by the dotted lines, C, causing a downward movement of the shaft 53 and intervening mechanism and cause the end of the lever 37 to actuate the starting trip 36 and permit the needle to per form its stitching functions.

As soon as the operator starts the stitching mechanism, pressure on the treadle 61 is removed, and the lever is brought back to its normal position. This movement withdraws the end of the lever 37 from the trip 36, to allow the latter to assume its. normal position when the stitching mechanism has completed its cycle of operation. Upon completion of a buttonhole, the lever is drawn forwardly beyond normal position as shown by the dotted line position B, rod 52, and pulls the chain 62, which actuates the trimmersto sever the thread. 7 r V Cooperating with this mechanism above described is a suitable gage for positively insuring the proper location of the button hole in'the exact center of the collar.

This gage generally comprises a lever pivotally mounted intermediate itsends in trunnion 71 carried at the upper end of a bracket 72 which is in turn carried y a hopper 73 supported at its ends by brackets 74 carried by the table 20. The forward end of this lever 70 is connected by means of a flexible link or chain 75 passing through a guide 76, the lower end of which chain is connected to the rod 44. A cotter pin or stop 77 passing through the chain above the guide 76 limits its downward movement. This connection permits the le ver to be rocked about its pivotal support 71 as the starting and stopping mechanism is actuated by the foot lever,

The operation and manner of using the machine will appear clear from the above description, but a brief statementthereof is as ollows The operator takes a bundle of collars, usually twenty-four, and places them in the hopper 73 and after snipping the binding string takes the top collar and moves it up wardly and rearwardly against the underside of the gage lever 70 until its left hand With the laterally moving portion 92 of the gage, as clearly shown in Fig. l. The right hand end of the collar is then moved over the top of .the gage lever. until it registers with the left end portion, and is then pulled with a suflicient degree of pressure toward the left to actuate certain trig er mechanism (not shown), permitting the l ever 70 to drop to the dotted line position shown in F 1g. 4. This step securely grips and holds the collar and just before or simultaneously with the rearward movement of the foot lever. 61 to the position shown'by dotted lines C, the slide is moved rearwardly by means of a handle which places the collar in operative position with respect to the needle 27, and the machine starts. Simultaneously with the starting of the machine the presser mechanism 104- drops to hold the collar in position, and the slide is returned to normal position to gage the next collar. On completion of stitching the button hole the foot lever is moved forwardly to normal'position which permits the stitching mechanism to stop. Upon further forward movement to the dotted line position B the trimmer 67 is actuated to cut the threads about the'collar. The second collar, having previously been gaged, during the stitching operation is immediately moved forward by the slide and the operation repeated. In

this manner a great saving of time is accom-,

plished as the stitching of the collar is done automatically while the operator is gaging the next collar. Of course after the collar has been sewed it is thrown to one side and the gage slide carrying the next collar is moved forwardly.

As the stitching mechanism and the trimming mechanism are wholly independent of each other, as clearly shown in the drawings, if the stitches are imperfectly formed, the trimmers need not be operated every time the stitching mechanism is operated.

- It is thus seen thatthe present invention provides a simple and practical machine which is substantially automatic in its op-.

eration andpermits a much larger output than heretofore accomplished. The mechanism comprises few parts which are relatively cheap to manufacture and install, and in short is believed to ac omplish among others, all the objects and advantages set forth.

As many changes could be made in construction of theabove device Without departing from the scope of the invention it is intended that all matter contained in the above description as shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

What I claim is 1. In combination, stitching mechanism, start and stop mechanism therefor, trimming mechanism, a lever having a normal intermediate position adapted to be moved in one direction'to start said stitching mechanism and in the opposite direction from its I intermediate position to trim the threads of said stitching mechanism, whereby either the stitching mechanism or the trimming mechanism may be operated independently.

2. In a button hole sewing machine in combination, a work support, a stitching mechanism positioned thereabove, trimmers operatively associated with the stitching mechanism, start and stop mechanism for the stitching mechanism comprising a lever occupying a normal intermediate position adapted to be moved in one direction to start the machine and in the opposite direction beyond the normal intermediate position to actuate the trimmer independently oi the stitching mechanism.

In a button hole sewing machine in combination, a work support, stitching mechanism positioned thereabove, a trimmer associated with the stitching mechanism, start and stop mechanism, a lever, intervening mechanism between the lever and the start and stop mechanism for conrolling the latter, and a second intervening mechanism between the first mentioned inter ening mechanism and the trimming mechanism for actuating the trimmer at a predetermined time with respect to the starting and stopping.

4. In a button hole sewing machine in combination, an auxiliary table, stitching mechanism mounted at one side thereof and a work support at the other, stop and start mechanism associated with the stitching mechanism, independent means cooperating with the stitching mechanism to complete a buttonhole, a lever, and intervening mechanism between said lever, the start and stog mechanism and the independent means aforesaid, said intervening mechanism comprising a double bell crank lever and a flexible connection between one arm of said bell crank lever and the start and stop mechanism and a flexible connection between the independent means and the other arm oi the double bell crank lever, stitching mechanism and the independent means may be successively operated, or one operated independent of the other.

5. In a button hole sewing machine in whereby the v combination, an auxiliary table, stitching mechanism mounted at one side thereof and a work support at the other, a stop and start mechanism ssociated mechanism, independent means cooperating with the stitching mechanism to complete a buttonhole, a lever, an intervening mechanism betweei'i said lever, the start and stop mechanism and the independent means aforesaid, said intervening mechanism comprising a, double bell crank lever and a flexible connection between one arm 01. said bell crank lever and the start and stop mecha nism, a flexible connection between the independent means and the other arm of the double bell crank lever, whereby the stitching mechanism and the independent means may be successively operated, or one operated independent of the other, and spring means associated with one of the parts of the intervening mechanism for restoring said parts to normal position.

6. In combination, stitching mechanism, trimming mechanism, stop and start mechanism, a lever having a normal intermediate position adapted to be moved in one direction to actuate the start mechanism and in the opposite direction to permit operation of the stop mechanism and actuate the trimming mechanism to trim the thread.

7. In combination, stitching mechanism, trimming mechanism, stop and start mechanism, a lever having a normal intermediate position adapted to be moved in one direction to actuate the-start mechanism and in the opposite direction to permit operation of the "stop mechanism and permit operation of the trimming mechanism to trim the thread.

8. In combination, stitch forming mechanism including a trimmer and stop and start mechanism, and operating mechanism therefor normally in an intermediate position and adapted to be moved in one direction to actuate the start mechanism and in the opposite direction to cause independent actuation of the trimmer.

in testimony whereof I aflix my signature.

HENRY C. MILLER.

with the stitching 

